The design of an adsorptive heat storage device of a closed type is given on Fig.
1. The closed-type adsorptive heat storage device is operated in 4 stages: heating an
adsorbent (heat-storage material) from the ambient temperature to the temperature of
the beginning of adsorption; adsorption of water vapour; heating an adsorbent to the
regeneration temperature and desorption of water; cooling an adsorbent to the
temperature of the beginning of adsorption.
It is necessary to choose operational parameters, at which the efficiency of the
thermal battery is the maximum. The control-flow charts of the algorithm for
calculating the efficiency of a thermal battery are given in Fig. 2. The efficiency
coefficient was calculated as, %:
100
=
in
u
Q
Q
(1)
where
u
Q
is useful heat (adsorption heat), kJ:
ads
ads
u
H
М
Q
=
, (2)
where M
ads
is adsorbent mass, kg; ΔH
ads
is adsorption heat, kJ/kg.
Figure 1. Design of the closed-type absorption heat storage device: 1 – heat-
insulated case; 2 – mesh partitions; 3 – the condenser; 4 – a plate for collecting
condensate; 5 – adsorption-desorption reactor; 6 – a coil pipe; 7 – a branch pipe; 8 – a
tank of water; 9 – evaporator; 10, 11 – covers; 12 – a tube; 13 – a branch pipe; 14 –
steel blinds; 15 – resistive heating element; 16 – steel blinds
Source: developed by authors [8]
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